We are in 2015 but we still have problems with blogging, at least I have problems. What I am looking for:
I am building a task module, to do time consuming jobs in background. A worker instance is constantly pooling redis db for a new task. However after first connection, somehow rediska (a php redis client) closes connection, and when I make query to db, it automatically creates a new connection using default settings. At this point new connection is not using the settings in the configuration. It is using hard coded default values. I don’t know why it is doing this but here is the solution.
Whenever you use a rediska key, explicitly tell the instance name you want to use.
$option = array("rediska"=>"use_this_instance_name");
$pointer = new Rediska_Key("job:$index:pointer",$option);
To define aforementioned rediska instance:
$options = array ( 'addToManager' => true, 'name' => "use_this_instance_name", 'namespace' => '', 'servers' => array( array( 'host' => Rediska_Connection::DEFAULT_HOST, 'port' => Rediska_Connection::DEFAULT_PORT, 'weight' => Rediska_Connection::DEFAULT_WEIGHT, 'db'=>2, 'persistent'=>TRUE, 'timeout'=>0 ) ) ); $redis = new Rediska($options);
If you are using centos in a virtual machine or a local machine you may want to change to console resolution so that you see more than 80×25 screen. For this, you need to modify the kernel line.
vi /boot/grub/grub.conf
add/change vga parameter
kernel /vmlinuz-2.6.18-8.el5 ro root=LABEL=/ vga=0x31A
reboot
That will set the resolution to 1280×1024. For a list of possible vga codes see http://wiki.antlinux.com/pmwiki.php?n=HowTos.VgaModes
Default vi that comes with fresh Centos 5 install may not have color support. Adding color support is easy.
Install necessary libraries.
yum install vim-common vim-enhanced
Add an alias to use vim for vi command.
Open bash file
vi ~/.bashrc
add following line
alias vi=vim
restart shell
source ~/.bashrc
That is it!
Installing nginx is straightforward, so I will not go into details, just check the nginx documentation for more.
First create a repo file.
vi /etc/yum.repos.d/nginx.repo
and add following content to repo file:
CentOS [nginx] name=nginx repo baseurl=http://nginx.org/packages/centos/$releasever/$basearch/ gpgcheck=0 enabled=1
To install php 5.3.8 we need extra repos (source article).
## Remi Dependency on CentOS 5 and Red Hat (RHEL) 5 ## rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-4.noarch.rpm ## CentOS 5 and Red Hat (RHEL) 5 ## rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-5.rpm
Install using added repos.
yum --enablerepo=remi install nginx php php-fpm php-common
Install necessary php modules for you.
yum --enablerepo=remi install php-pear
Start Nginx
/etc/init.d/nginx start ## use restart after update ## OR ## service nginx start ## use restart after update
Start PHP-FPM
/etc/init.d/php-fpm start ## use restart after update ## OR ## service php-fpm start ## use restart after update
Autostart Nginx on boot
chkconfig --add nginx chkconfig --levels 235 nginx on #Autostart PHP-FPM on boot chkconfig --add php-fpm chkconfig --levels 235 php-fpm on
Now it is time to configure nginx to work with php.
vi /etc/nginx/conf.d/test.conf
put these lines into file.
server { server_name example.net; access_log /var/logs/nginx/example.access.log; error_log /var/logs/nginx/example.error.log; root /var/www/example; location / { index index.html index.htm index.php; } location ~ \.php$ { include /etc/nginx/fastcgi_params; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /var/www/example$fastcgi_script_name; } }
restart nginx
service nginx restart
create an index file to test.
vi /var/www/example/index.php
<?php phpinfo(); ?>
Mercurial may not be present in default repo that comes with a fresh Centos 5 install. Adding RPMForge repo should solve the problem. I will copy paste necessary section from Centos wiki:
Download the rpmforge-release package. Choose one of the two links below, selecting to match your host’s architecture. If you are unsure of which one to use you can check your architecture with the command uname -i
for i386 :
wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el5.rf.i386.rpm
for x86_64:
wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el5.rf.x86_64.rpm
The preferred rpmforge-release package to retrieve and to install in order to enable that repository is one of the two listed above.
Install DAG’s GPG key
rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt
Verify the package you have downloaded
rpm -K rpmforge-release-0.5.2-2.el5.rf.*.rpm
Security warning: The rpmforge-release package imports GPG keys into your RPM database. As long as you have verified the md5sum of the key injection package, and trust Dag, et al., then it should be as safe as your trust of them extends.
Install the package
rpm -i rpmforge-release-0.5.2-2.el5.rf.*.rpm
This will add a yum repository config file and import the appropriate GPG keys.
Then try to install something like this
yum install mercurial
it is done.